/*
 * The MIT License (MIT)
 * Copyright (C) 2024 Huawei Device Co., Ltd.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 */

use futures::prelude::*;
use napi::bindgen_prelude::*;
use napi_derive::napi;
use tokio::fs;

#[napi]
async fn read_file_async(path: String) -> Result<Buffer> {
  fs::read(path)
    .map(|r| match r {
      Ok(content) => Ok(content.into()),
      Err(e) => Err(Error::new(
        Status::GenericFailure,
        format!("failed to read file, {}", e),
      )),
    })
    .await
}

async fn parse_string(path: String) -> Result<String> {
  Ok(path + "[rust async fn]")
}

#[napi]
async fn parse_string_async(path: String) -> Result<Buffer> {
  parse_string(path).await.map(|v| Buffer::from(v))
}

#[napi]
async fn async_multi_two(arg: u32) -> Result<u32> {
  tokio::task::spawn(async move { Ok(arg * 2) })
    .await
    .unwrap()
}

#[napi]
async fn panic_in_async() {
  panic!("rust panic in async function");
}
